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DNA testing
why is DNA screening of blood so time-consuming?
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It really depends what they are screening for...and "time-consuming" is relative.
In my experience, a screen for a genetic mutation involves either a restriction enzyme digest or a PCR (polymerase chain reaction) and then running on an agarose gel which doesn't seem too long ..but maybe I speak from a different perspective...are you waiting for a screen? The hold up may be the queue of other samples rather than the screen. Or if it is a particularly sensitive issue - these things tend to get rescreened to ensure accuracy.
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